I've been using the crypt() command to verify users, against a passwd file
in my programs, However, now that i Upgraded to RedHat 5.0
this Command Now Just Spits Out Errors(on compilation)! I have to put it
back on the old machine to compile,
then move the binary back... (PAIN.) old machine was RedHat 4.0 & 3.0 (both
work)
reading the MAN-PAGES, i added this, (only difference i could find.)
#define _XOPEN_SOURCE
and i keep getting this new compiler error:
/tmp/cca038241.o: In function `CheckPassword':
/tmp/cca038241.o(.text+0x18f): undefined reference to `crypt'
if anyone could share some wisdom, it would be appreciated!! (Source Below)
-Joe
-----PASSWORD.H SOURCE----------
#define _XOPEN_SOURCE
int CheckPassword(char *Name, char *Pass);
// Returns (1) if Password Is Correct, (0) Otherwise.
// Uses 'passwd' file in current Directory.
---------------------------------------------
----------------------PASSWORD.C SOURCE-------------------------
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "password.h"
int CheckPassword(char *Username,char *Pass) {
FILE *F;
int r1=0,DONE=0,PASSCORRECT=0;
char Salt[100];
char *RealCryp;
char Cryp[20];
char ch=0;
F=fopen("./passwd","rb");
while ((DONE==0)&&(!feof(F))) {
fread(&ch,1,1,F);
if (ch=='\n') {
r1=0;
fread(&ch,1,1,F);
while ((ch==Username[r1])&&(DONE==0)) {
++r1;
fread(&ch,1,1,F);
if ((Username[r1]==0)&&(ch==':')) {
DONE=1; ch=0;
};
};
};
};
if (DONE==1) {
PASSCORRECT=1;
fread(&ch,1,1,F);
for (r1=0;r1<=12;++r1) { /// 13 characters to a passwd
Cryp[r1]=ch;
fread(&ch,1,1,F);
}
Cryp[13]=0;
Salt[0]=Cryp[0];
Salt[1]=Cryp[1];
Salt[2]=0;
RealCryp=crypt(Pass,Salt);
for (r1=0; r1<=12;++r1) if (RealCryp[r1]!=Cryp[r1]) PASSCORRECT=0;
}
fclose(F);
return PASSCORRECT;
}
----------------------------------------------------------------------------
